Hollow chain link pin



FIG. 1 is a top plan view of a hollow chain link pin showing our new design;

FIG. 2 is a front elevation view thereof; and,

FIG. 3 is a cross sectional view of FIG. 1 through 3-3.

The broken lines shown in the figures are for the purpose of illustrating portions of the hollow chain link pin which forms no part of the claimed design. 

CLAIM The ornamental design for a hollow chain link pin, as shown and described. 